diff options
| author | Ivan Stepchenko <sid@itb.spb.ru> | 2024-11-14 16:29:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-13 12:47:12 +0100 |
| commit | e39e79589667cb68bf6e9f01a8a7b5d5a071d4d7 (patch) | |
| tree | 333aa3b6cb8f20fc8b8ec3530de076750cebf3b3 /drivers/mtd | |
| parent | 674e17c5933779a8bf5c15d596fdfcb5ccdebbc2 (diff) | |
mtd: onenand: Fix uninitialized retlen in do_otp_read()
commit 70a71f8151b9879b0950668ce3ad76263261fee0 upstream.
The function do_otp_read() does not set the output parameter *retlen,
which is expected to contain the number of bytes actually read.
As a result, in onenand_otp_walk(), the tmp_retlen variable remains
uninitialized after calling do_otp_walk() and used to change
the values of the buf, len and retlen variables.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 49dc08eeda70 ("[MTD] [OneNAND] fix numerous races")
Cc: stable@vger.kernel.org
Signed-off-by: Ivan Stepchenko <sid@itb.spb.ru>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/onenand/onenand_base.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/nand/onenand/onenand_base.c b/drivers/mtd/nand/onenand/onenand_base.c index 188b8061e1f7..7ac3f498709d 100644 --- a/drivers/mtd/nand/onenand/onenand_base.c +++ b/drivers/mtd/nand/onenand/onenand_base.c @@ -2916,6 +2916,7 @@ static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len, ret = ONENAND_IS_4KB_PAGE(this) ? onenand_mlc_read_ops_nolock(mtd, from, &ops) : onenand_read_ops_nolock(mtd, from, &ops); + *retlen = ops.retlen; /* Exit OTP access mode */ this->command(mtd, ONENAND_CMD_RESET, 0, 0); |